Fuel Injector Group Supply Voltage Circuit/Open
The P2152 code indicates a problem with the supply voltage circuit for a group of fuel injectors. This typically means the PCM has detected an open or short circuit in the voltage supply to one or more injectors, often caused by a faulty injector driver, wiring issues, or a failed PCM. This can lead to misfires, poor fuel economy, and potential engine damage if not addressed.
1. Most Common Causes
- Blown or faulty fuse/relay for injector group 'C' power supply
- Open or broken wiring in the voltage supply circuit for group 'C'
- Loose or corroded connector/terminal in the injector harness for group 'C'
- Short to ground in the power supply circuit for group 'C'
- Abnormal internal resistance in a group 'C' injector causing voltage drop
- Internal ECM/PCM failure in the power driver for group 'C'
2. Symptoms You Will Notice
- Engine misfire or rough idle
- Check Engine Light illuminated
- Reduced engine power and poor acceleration
- Increased fuel consumption
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P2152 and check for related codes.
Step 2: Visually inspect the injector wiring harness and connectors for damage, corrosion, or loose connections.
Step 3: Test the voltage supply at the injector connector with a multimeter (should be battery voltage with key on).
Step 4: Check the injector driver circuit using a lab scope or test light to verify PCM output.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause misfires and potential catalytic converter damage. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and minor repairs like wiring fixes, but can be higher if the PCM needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.